Kia Picanto: Engine Control System / Intake Air Temperature Sensor (IATS)

Kia Picanto JA 2017-2022 Service & Repair Manual / Engine Control / Fuel System / Engine Control System / Intake Air Temperature Sensor (IATS)

Specifications
Specification
▷ Type: Thermistor type
Temperature
Resistance (kΩ)
°C
°F
-40
-40
40.93 - 48.35
-30
-22
23.43 - 27.34
-20
-4
13.89 - 16.03
-10
14
8.5 - 9.7
0
32
5.38 - 6.09
10
50
3.48 - 3.90
20
68
2.31 - 2.57
30
86
1.9 - 2.1
40
104
1.08 - 1.21
50
122
0.76 - 0.85
60
140
0.54 - 0.62
70
158
0.40 - 0.45
80
176
0.29 - 0.34
90
194
0.22 - 0.26
100
212
0.17 - 0.20
110
230
0.13 - 0.15
120
248
0.10 - 0.12
130
266
0.08 - 0.09

Description and operation
Description
Integrated in the Manifold Absolute Pressure Sensor, the Intake Air Temperature Sensor (IATS) detects the intake air temperature.
To precisely calculate the amount of air, air temperature correction is needed as air density varies with temperature. So, the ECM uses IATS signal as well as MAPS signal. It has a Negative Temperature Coefficient (NTC) Thermistor whose resistance changes in reverse proportion to temperature.

Schematic diagrams
Circuit Diagram
[A/T]

[M/T]

Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the IATS connector.
3.
Measure resistance between the IATS terminals 3 and 4.
4.
Check that the resistance is within the specification.
Temperature
Resistance (kΩ)
°C
°F
-40
-40
40.93 - 48.35
-30
-22
23.43 - 27.34
-20
-4
13.89 - 16.03
-10
14
8.5 - 9.7
0
32
5.38 - 6.09
10
50
3.48 - 3.90
20
68
2.31 - 2.57
30
86
1.9 - 2.1
40
104
1.08 - 1.21
50
122
0.76 - 0.85
60
140
0.54 - 0.62
70
158
0.40 - 0.45
80
176
0.29 - 0.34
90
194
0.22 - 0.26
100
212
0.17 - 0.20
110
230
0.13 - 0.15
120
248
0.10 - 0.12
130
266
0.08 - 0.09

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) terminal.
2.
Disconnect the manifold absolute pressure sensor connector (A).
3.
Remove the sensor (B) from the Intake manifold by loosening the mounting screws.
Manifold absolute pressure sensor mounting screw :
6.4 - 8.3 N·m (0.65 - 0.85 kgf·m, 4.7 - 6.1 lb·ft)

Installation
   
Tighten the component to the specified torques.
Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect if it is damaged before installing.
Carefully insert the sensor into the installation hole without damaging it.
1.
Install in the reverse order of removal.
Manifold Absolute Pressure Sensor (MAPS)
Specifications Specification Pressure [kPa (kgf/cm², psi)] Output Voltage (V) [Vref=5V] 32.5 ( ...

Ambient Temperature Sensor (ATS)
Specifications Specification Temperature[⁰C(⁰F)] Resistance(kΩ) -40(-40) 811.1 - 956.8 -20(-4) 255.6 - 287.7 0(32) 91.5 - ...

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